Sidney ii



(No Model.)

S. H. SHORT. DRIVING MECHANISM FOR .DYNAMO ELECTRIC GENERATORS. No. 448,303. Patented Mar. 17, 1891.

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UNITED STATES PATENT OFFICE.

SIDNEY II. SHORT, OF CLEVELAND, OHIO, ASSIGNOR TO THE SHORT ELEC- TRIC RAILIVAY COMPANY, OF SAME PLACE.

DRIVING MECHANISM FOR DYNAMO-ELECTRlC GENERATORS.

SPECIFICATION forming part of Letters Patent No. 448,303, dated March 17, 1891.

Application filerl November 6, 1890. Serial No. 370,536. (No model.)

To aZZ whom it may concern.-

Be it known that I, SIDNEY II. SHORT, of Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and 5 useful Improvements in Driving Mechanism for Dynamo-Electric Generators and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which I it appertains to make and use the same.

This invention relates more particularly to driving mechanism for dynamo-electric generators by means of a steam-engine or prime mover coupled directly to the armature-shaft I of the generator; but it is applicable in part also to generators connected with the prime movers by belted, cogged, or other gearing.

It consists in insulating the dynamo mounted on an insulating-base from its drivzo ing-engine, and thus completely insulating it from the ground. For this purpose an insulating-section is introduced in the driving mechanism between the dynamo and the steam-engine, )referably between two parts 2 5 of the armature-shaft. In the case of a direct-coupled dynamo the two parts of the shaft are preferably mounted in bearings on the frame of the dynamo and steam-engine, respectively.

0 The insulating-section of this invention will be understood as having different places or surfaces in contact with the parts on the side of the dynamo and steam-engine, respectively,

and as differing, therefore, from a belt whose 3 5 inner surface travels over and is thus alternately in contact with the driven pulley on the dynamo and driving-pulley on the steamengine.

The accompanying drawing, which forms part of this specification, is aside view, partly in section, illustrating a direct-coupled or steam dynamo constructed in accordance with the invention.

The steam-engine A, of any ordinary orsuit- 4 5 able construction, has its piston-rod 2 (or rods, it there be more than one) connected with a crank on the shaft C, which is in two parts 3 and I, respectively, with the insulating-section D interposed. This section consists, as

shown, of a disk of insulating material, of somewhat greater diameter than the shaft,

interposed between the flanges 3 and 4 on the two parts of the shaft and secured by bolts 5, each of which is surrounded by the insulating-sleeve 6, with heads 7 under the 3 heads of the bolts 5. The part 3 of the shaft C is supported on the frame of the steam-engine. The part 4 of the shaft C is journaled in hearings on the dynamo E and has the armature mounted thereon. The dynamo E is mounted on an insulating-base B or sup port adapted to insulate the dynamo from the ground, but otherwise of anyordinary or suitable construction. It need not be wholly of insulating material. As represented there is a sheet of insulating material under the frame of the dynamo. The wires or conductors F G for taking off the current may be connected with a metallic circuit or a circuit composed partly of the ground. 76

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A dynamo-electric generator mounted on an insulating-base and having the steam-engine directly coupled thereto and provided with the driving-shat t in two parts rigidly connected together, one supported on the steamengine and the other having the armature fastened thereto, with an insulating-section between said parts, substantially as described.

2. In combination with a dynamo-electric generator mounted on an insulating-base and the steam-engine foroperating the same, driving mechanism rigidly connecting the dynamo S5 with the engine and provided with an insulating-section between the steam-engine and the dynamo, whereby the said generator is insulated from the ground, substantially as described. 0

3. In combination with a dynamo-electric generator and the steamengine foroperating the same, driving mechanism connecting the dynamo withtheengineand comprisingashat't in two parts rigidly connected together, with an 5 insulatin -section between, the power being communicated by the engine to one of the said parts and received by the dynamo from the other part, substantially as described.

4. In combination with a dynamo-electric generator and a steam-engine for operating the same, a driving-shaft in two rigidly-coir IOO nected parts, with an interposed insulatingsection, one of said parts being supportedon the engine-frame and provided with a crank to which the piston-rod. is jointed and the other part being supported on the frame of the dynamo and fastened to the armature, substantially as described.

5. In combination with a dynamo-electric generator and a steam-engine for operating the same, driving mechanism rigidly connecting the dynamo with the steam-engine axial alignment with the armature-shat t of the dynamo-electric generator, with a rigid connectlon between the two, consisting of a metal flange on each, insulating material interposed between the two metal flanges, and insulated bolts passingthrough both metal flanges, substantially as described.

8. The combination of a dynamo-electric generator and a steam-engine the drivingshaft of which is in axial alignment with the armature-shaft of the dynamo-electric gener- 1 ator, with a rigid connection between the two,

consisting of a metal flange on each, insulatin g materal interposed between the two metal flanges, and insulated bolts passing through both metal flanges and the insulating material interposed between them, substantially as described.

9. The combination of a dynamo-electric generator insulated from the ground and a steam-engine the driving-shaft ofwhich is in axial alignment with the armature-shaft of the E dynamo-electric generator, with a rigid con- =1 nection between the two, consisting of a metal 5 flange on each, insulating material interposed between the two metal flanges, and insulated bolts passing through both the two metal flanges and the insulating material interposed between them, substantially as described.

In testimony whereof I have signed this specification in the presence of two subscribing Witnesses.

SIDNEY II. SHORT.

Witnesses:

A. B. CALHOUN, O. J. LEEPHART. 

